<?

define('MAGPIE_CACHE_DIR', 'cache');
define('MAGPIE_INPUT_ENCODING', 'UTF-8'); 
define('MAGPIE_OUTPUT_ENCODING', 'UTF-8');

@require_once('magpierss-0.72/rss_fetch.inc');
@require_once('feedcreator/include/feedcreator.class.php');
@require_once('xmllib.php');

/* Set Image properties 
$image = new FeedImage();
$image->title = "";
$image->url = "";
$image->link = "";
$image->description = "";
$rss->image = $image;
*/

function pubDate($rssitem) {
  if($rssitem['pubdate'])
    return $rssitem['pubdate'];
  if($rssitem['updated'])
    return $rssitem['updated'];
  if($rssitem['published'])
    return $rssitem['published'];
}

function contentDesc($rssitem) {
  	$minLength = 3;
  	$desc = $rssitem['content']['encoded'];
  	if ($desc && strlen($desc) > $minLength) {
		return $desc;
	}
	$desc = $rssitem['atom_content'];
	if ($desc && strlen($desc) > $minLength) {
		return $desc;
	}
	$desc = $rssitem['description'];
	if ($desc && strlen($desc) > $minLength) {
		return $desc;
	}
}

function createFeed() {
	$feed_path = "cache/feed.xml";
	$RSS_FEEDS = array("http://www.gracepointstories.org/feed/",
	                   "http://www.gracepointforum.org/feeds/posts/default?alt=rss",
	                   "http://www.disgracepointonline.org/feeds/posts/default?alt=rss",
	                   "http://gracepointworship.org/?feed=rss2",
                     "http://www.dishgracepoint.com/feeds/posts/default?alt=rss",
										 "http://feeds.feedburner.com/GracepointDevotionsSharing",
                     "http://feeds.feedburner.com/GracepointVideoGracepointFellowshipChurch");
//	                   "http://kellykangblog.wordpress.com/feed/");
	$MAX_POSTS_TO_CACHE = 300;
	
	/* Set RSS properties */
	$rss = new UniversalFeedCreator();
	//$rss->useCached();
	$rss->title = "";
	$rss->author = "";
	$rss->pubdate = "";
	$rss->description = "";
	$rss->link = "";
	$rss->syndicationURL = "";
	       
	$feeds = array();
	foreach($RSS_FEEDS as $url) {
	  $item = array();
	  $current_feed = fetch_rss($url);
	  $current_items = $current_feed->items;
	  for($i = 0; $i < $MAX_POSTS_TO_CACHE; $i++) {
		$current_item = $current_items[$i];
		$current_item['channel-title'] = $current_feed->channel['title'];
		$current_item['channel-link'] = $current_feed->channel['link'];
	    array_push($item, $current_item);
	  }
		
	  array_push($feeds, $item);
	}
	
	for($i = 0; $i < $MAX_POSTS_TO_CACHE; $i++) {
	  $most_recent = 0;
	  for($j = 0; $j < count($feeds); $j++) {
		$most_recent_date = pubDate($feeds[$most_recent][0]);
		$current_item_date = pubDate($feeds[$j][0]);
		if (!isset($current_item_date) || $current_item_date == '') {
			$most_recent = $most_recent;
		} else if (!isset($most_recent_date) || $most_recent_date == '') {
			$most_recent = $j;
		} else {
			$most_recent = strtotime($most_recent_date) > strtotime($current_item_date)
		                      ? $most_recent
		                      : $j;
		}
	  }
	
	  $item = array_shift($feeds[$most_recent]);
	  $new_item = new FeedItem();
	  $new_item->title = $item['title'];
	  $new_item->date = pubDate($item);
	  $new_item->author = $item['dc']['creator'];
	  $new_item->link = $item['link'];
	  $new_item->category = $item['category'];
	
	  // With description, remove weird characters, convert br's and p's to newlines, then strip tags
	  $str = preg_replace('/[\x00-\x1F\x80-\xFF]/', ' ', contentDesc($item));
	  $str = str_replace('<br', ' <br', $str);
	  $str = str_replace('<p', ' <p', $str);
	  $str = strip_tags($str);
	  $new_item->description = trim($str);
	
	  $new_item->additionalElements['channel-title'] = $item['channel-title'];
	  $new_item->additionalElements['channel-link'] = $item['channel-link'];
	  if (isset($item['title']) && $item['title'] != "" && strlen($new_item->description) > 30) {
	  	$rss->addItem($new_item);
	  }
	  
	}

	$rss->saveFeed("RSS2.0", $feed_path, false);
}

//Check if it's cached, otherwise, create cache
$feed_path = "cache/feed.xml";
if(!file_exists($feed_path) || (time() - filemtime($feed_path)) > 1800 ) {
    // Delete cache
    $dir = './cache';
    $command = 'rm ' . $dir . '/*'; 
    system($command);

	createFeed();
}                                             

$startIndex = isset($_GET["startIndex"]) ? (int) $_GET["startIndex"] : 0;
$range = isset($_GET["range"]) ? (int) $_GET["range"] : -1;  
$xml = file_get_contents($feed_path);

if ($startIndex != 0 || $range >= 0) {
	// Only get the feeds that we want
	$arr = XML_unserialize($xml);
	$items = $arr['rss']['channel']['item'];
	
	$newItems = array();
	$stopIndex = $range > 0 ? $range + $startIndex : count($items);
	for ($i = 0; $i + $startIndex < $stopIndex; ++$i) {
		if (isset($items[$i + $startIndex])) {
			$newItems[$i] = $items[$i + $startIndex];
		}
	}
	$arr['rss']['channel']['item'] = $newItems;    
	$xml = XML_serialize($arr);
}                                           

@header('Content-type: text/xml');
echo $xml;                     
 
?>